Auxiliary radiating attachment for hot-air furnaces



March 16 19.26. 15776385 E. R; TAYLOR AUXILIARY RAD'IATING ATTACHMENT FOR HOT AIR FURNACES Filed Feb. 11, 1925 2 Sheets-gShe'et 1- J 630 4 2z I f T 40 l nood-m72."y ooooooo o Z0 l I 3 3 f5 .n .ff

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E. R. TAYLOR AUXILIARY RADIATING ATTACHMENT FOR HOT AIR FURNACES Earl RIT Patented Mar. i6, i926.

EARL n. TAYLOR, 0E ADEL, IOWA.

AUXTLIARY RADIATING ATTACHMENT FOR IIOT-AIR FURNACES.

Application led 'February 11, 1925. Serial' No. 8,468.

To all whom t may concern:

Be it known that I, EARL R. TAYLOR,l a citizen of the United States, residing at Adel, in the county of Dallas and State of Iowa, have invented certain new and useful Improvements in an Auxiliary Radiating Attachment for Hot-Air Furnaces, of which 'the following is a specification.

This invention relates to improvement in hot air furnaces, and more specifically comprises a novel radiating attachment which may be used in connection with the various types of hot air furnaces.

The primary object of this invention is the provision of a novel attachmentmvhich may be readily used as an accessory for hot air furnaces, and which may be readily attached to conventional hot air furnaces, with but little trouble, and which when installed will increase the heating efficiency of the hot air furnace.

A further object of this invention is the provision of a novel type of heating radiating attachment for hot air furnaces, comprising a plurality of detachable radiating structures, which may be used on conventional types of hot air furnaces, and which will serve to increase the heating efficiency of the furnace; lower fuel consumption; and preserve the life. of the furnace and the parts thereof.

A further object of this invention is the provision of a novel type of heat radiating attachment for use in hot air furnaces between the lire portion of the` furnace and the outer casing, and which is Vof such nature vas to properly guide and Vdirect air currents into proximity to heated radiating surfaces, so that the air passing into the rooms of the building will be most effectively heated.

A further object of this invention is the provision of a novel type of heat radiating lin adapted for use in connection with hot air furnaces and the like.

Other objects and advantages of this invention will be apparent during the course of the following detailed description.

In the accompanying drawings, forming a part of this specication, and wherein similar reference characters designate corresponding parts throughout the several views,

Figure 1 is a vertical sectional view `taken through a conventional type of hot air furnace, showing the relation of the novel auxiliary heat radiating attachment with respect thereto.

Figure 2 is a cross sectional view taken transversely through the hot air furnace, showing the provision of the novel heat radiating attachment to the lire dome of the furnace.

Figure 3 is an enlarged cross sectional view taken through a hot air furnace showing the radiating attachment. l

in the dra-wings, wherein for the purpose of illustration is shown only a preferred embodiment of this invention, the letter A may generally designate a hot air furnace, which may include'the inner shell B; outer casing C; and novel heat radiating attachment D. The attachment D consists of a plurality of iin structures E, supported and held in definite relation by a supporting ring G.

As in well known hot air furnace structures the inner shell B is of cylindrical formation, in the lower portion thereof providing the grate structure l0, below which the ash pit 11 is provided, and immediately above which the fire boX 12 is provided. Interiorly of the casing B, in the fire box 12 insulating fire brick 13 is provided, in order to protect the shell B from the intensity of the heat which it is necessary to provide in the fire box, in order to sufficiently heat the air in the space 16 between the shell B and the casing C. Above the fire brick 13, the dome portion 18 of the shell B receives the heat from the fire, and by conduction passes therethrough into the space 16 and from here is carried through suitable conduits to the rooms of the building or structure tobe heated.

The inefficiencyv of heat production of the conventional hot airfurnace, in proportion to the amount of fuel consumed, is well known. The hottest point in the furnace, is the lire pot 12, which has to be insulated by the fire brick 13, for protection of the shell B, and the heat produced at this hottest point in the fire box is not utilized as it should be for heating the air traveling in the space 16. In the conventional hot air furnace the dome 18 above the fire brick 13 is heated from the products of combustion, and it is the heat radiating from thisdome portion 18 which provides the major heat radiation for heating the air'in the space 16. Due to the cylindrical dome shaped shell B, -a minimum heat radiating surface is pro- Cit ice v vided, and it is the objectV of this invention to provide an auxiliary heat radiating attachment for use lwith the dome 18 in the space 16 for the conventional radiation of heat, in order that maximum heating efliciency with minimum fuel consumption may be obtained. The domo portion 18 of the shell B, of course, includes the cylindrical side wall 20, and the dome shaped top wall 22. @ther conventional features of the hot air furnace may include the coal inserting door way 23, and draft flue connection 24.

rlie attachment D consists of a plurality of the fin structures E which are radially supported by the furnace shell B, extending radially from the side and top walls 20 and 22 of the dome portion 18 of the shell B, and projecting into the space 16 for eflicient radiation of heat from the furnace shell B, to most effectively heat the air in the space 16 and properly direct the air current to the ieat radiating surfaces.

The ring shaped member Gr is to be used for supporting the heat radiating lin structures E and is L-sliapcd in cross section. rlhe ring G is removably supported centrally of and directly upon the dome top wall 22, as is illustrated inlligures l and 2 of the drawings. This ring shaped member G provides an upstanding flange 30, for detachably holding` the iin structures E in assembled relation, as will be subsequently described.

Each fin structure E consists of a pair of supporting angle bars 35 and 3G, between which the central fins 37 g the intermediate i'ins 33; and the outer fins 39 are clamped. rthe attaching angle bars 35 and 36 at the upper ends thereof are bent to provide the arcuate portions 40 adapted to lie upon the dome wall 22, and including the straight vertical. portions 4l arranged obliquely to the portions 40, and adapted to extend downwardly along the outer surfaces of the side wall 20. rlhe angle bars 35 and 36 at their upper ends, are hook-shaped, at 44, for engaging over the flange 30 of the supporting` ring Gr, so that they may be supported in resting relation on the top wall-22 of the furnace shell B, and along the outer surface of the side wall thereof. Each angle bar 35 and 36 includes an attaching leg 49, which are riveted together by rivets 50, to secure attaching portions of the fins 37, to 39 inclusive between said legs 49; the angle bars 35 and 3G also include flange portions or legs 52 in the same plane, adapted to rest against the outer surfaces of the walls 2O and 22 of the furnace shell B.

The central iin structure 37 is preferably plane and L-shaped in formation, extending upwardly from the portions 40 of the angle of the dome portion 18 of the furnace. The fins -38 and 39 in contradistinction to the fin 37 only extend upwardly along the side wall 20 of the furnace shell B, and do not extend along the dome wall 22, as does the iin 37, which is for the very obvious reason that greater radiating surface is provided about the periphery of the wall 20, than on the top wall 22.

The intermediate fins 38 each includes the attaching portion 55; an oblique portion 5G; and the outer fin portion 57. When the fins 38 are assembled on the structure G, the attaching portions 55 lie in abutting relation at opposite sides of the central lin 37, with the portions 56 obliqucly extending in opposite directions from the plane of the central fin 37, and with the outer lin portions 57 arranged in parallel planes with the central fin 37 and providing central channel ways 60 along which the air currents may travel in the space 16, to the radiating surfaces of the iin structures. The outer fins 39 are analogous in shape to the intermediate fins 33, each including attaching portions 6l, which are not as great width as the attaching portions 55 of the intermediate fins 38. The outer iins 39 furthermore include the laterally extending' intermediate portions 62, obliquely arranged to the plane of the attaching portions (3l, and the outer iin portion 63, arranged in spaced parallel relation with the central lin 37 and the portions 57 of the intermediate fins 38. n assembled relation in the structure D the offset intermediate portions (32 of the fins 39 are arranged in spaced relation between the angle bars 35 and 36 and the oblique portions 56 of the intern'iediate hns, and the outer portions G3 of the fins 39 are arranged parallel as above mentioned to the outer portions of the intermediate fins and to the central lin 37, and between the intermediate and outer fins 38 and 39 ways G5 are provided, for proper direction of the air currents to the heat radiating structures.

In order to provide economical and cicient iin structures each of the fins 37, 33 and 39 may include a pair of sections of exact formation, in the abutting conforming relation illustrated in Figure 3.

In assembled relation the fins 37 to 39 inclusive are connected between the angle bars 35 and 36 by the rivets 50 above mentioned, so that they are vertically disposed along the side wall 2O of the furnace shell B, as is illustrated in Figures l and 2 of the drawings. In this relation the lower ends of the vertical iin structures D extend entirely over the outer surfaces of the dome portion 18 of the shell B, and downwardly over that portion of the shell B within which the fire bricks 13 are provided, so as to utilize all head radiating` surface of the furnace. The structures E may of course be lll() shortened to conform to the construction of the particular furnace upon which they are placed, and they may be rearranged as to design, to conform to the conventional types of furnace structures now made.

As to assemblage of the iin structure D in the furnace A, a pipe of the furnace is taken down, and the supporting ring inserted in resting relation on the dome wall 22 of the shell B. The structures E are then hooked over the supporting ring G, and rest by gravity on the dome portions of the furnace, with the leg portions 52 of the angle bars 35 and 36 engaging the heated walls of the furnace shell B, as well as the end edges of the fins 37, 88 and 39 engaging the heated walls of the furnace, for the purpose of radiating the heat into the space 16, as can well be understood. The particular lin arrangement of each of the structures: E serves the useful purpose of properly guiding the air in its path directly onto the heated fin and wall surfaces, and preventing eddying of the air current passing through the furnace hot air chamber 16.

F rom the foregoing description it will be apparent that a novel attachment for hot air furnaces has been provided, which may be easily assembled in connection with conventional hot air furnaces. The structures E and supporting'v member Gr are truly an attachment, and to be used as an accessory for furnaces already installed in buildings. They do not constitute an integral part of the furnace structure, and it is not necessary to alter the construction of conventional hot air furnaces in order to accomplish their attachment. The fin structures are preferred, as shown, but may be altered to conform to any suitable type of heat radiating lin to be used as an attachment, without departing` from the spirit of the invention or the scope of the claims.

I claim:

l. In an attachment of the class described the combination with a hot air furnace including an inner lire receivingheater shell and an outer casing' with an air space between the shell and casing, said .shell including a top Wall and side walls, a ring shaped member removably supported by the top wall, and radially extending fin members detachably supported by said ring shaped member so as to extend in abutment along said top wall and alongl the side wall of .said shell within the air space between said shell and casing.

2. In combination withV a furnace heater shell including a top wall and cylindrical sidewall, the combination of a supporting member carried by the top wall, and L- shaped iin structures carried by the supporting member in radially extending relation therefrom engaging ysaid top wall and side wall and including multiple lin 'structures extending along said side waill of the shell.

8. As an article of manufacture a lin structure for heaters comprising an L-shaped iin, and fins laterally extending therefrom in spaced relation.

4t. As an article of manufacture a iin construction comprising a pair of attaching angles of L-shaped section, a central lin of L-shaped formation, and side fims of straight formation connected at opposite sides of said L-shaped iin between said angles andV at their outer ends in spaced substantially parallel relation 'with each other and with said central lin to provide ways along which air may pass for heating purposes.

5. In an attachment of the class described the combination with a hot air furnace including an inner fire receiving heater shell and an outer casing with an air space between the shell and casing, said .shell including a top wall, a relatively small ring shaped member for detachable support upon said top wall including an upwardly extending flange, and fins for support upon said shell having hooked ends for movable connection to the flange of the detachable ring.

6. As an article of manufacture a fin structure for heaters comprising a substantially L-shaped supporting iin including a top leg and a side leg, and a plurality of other tins connected along the side leg of said L-shaped iin, each of said last men tioned fins, including a portion connected to the side leg of the L-shaped fins, a portion extending transversely outwardly from the L-shaped iin, and a portion disposed in parallelism with the side leg of the L-shaped fin, said last mentioned portions being disy posed in spaced relation with each other and with the side leg of the iin to provide channels opening outwardly from the L- shaped fin.VK

EARL R. TAYLOR.

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